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Cation Exchange and Sorption Properties of Crystalline α-Titanium(IV) Phosphate

✍ Scribed by Bipini Bihari Sahu; Kulamani Parida

Publisher: Elsevier Science
Year: 2002
Tongue: English
Weight: 180 KB
Volume: 248
Category: Article
ISSN: 0021-9797
DOI: 10.1006/jcis.2001.7818

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✦ Synopsis

The ion-exchange and sorption properties of alpha-titanium bis(monohydrogen orthophosphate) monohydrate of composition Ti(HPO(4))(2).H(2)O was studied in aqueous electrolyte solutions of KCl over the temperature range of 300-320 K, varying the pH and metal ion concentration in the solution. The data were explained on the basis of the law of chemical equilibrium and the metal ion sorption data were fitted to Langmuir parameters. Further, the extent of sorption was found to increase with increasing temperature and metal ion concentration in the selectivity order Fe(3+)>Cu(2+)>Co(2+)>Mn(2+)>Cr(3+)>Ni(2+). The values of Langmuir constants were used to calculate the various thermodynamic parameters, such as DeltaG(0), DeltaH(0), and DeltaS(0), during the sorption process.

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